Wyoming Snow Precipitation Update
United States Natural Resources Water and Climate Center
Department of Conservation Portland, Oregon
Agriculture Service
S N O W - P R E C I P I T A T I O N U P D A T E
Based on Mountain Data from NRCS SNOTEL Sites
As of TUESDAY: OCTOBER 6 , 2009
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
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WYOMING
SNAKE RIVER
BASE CAMP 7030 .1 .0 .6 .2 300
COTTONWOOD CREEK 7670 .7 .0 1.0 .3 333
GRAND TARGHEE 9260 2.2 -M * 1.1 -M *
GRANITE CREEK 6770 .4 .0 .5 .2 250
GRASSY LAKE 7265 .4 .0 .4 .4 100
GROS VENTRE SUMMIT 8750 .8 .1 800 .8 .3 267
GUNSIGHT PASS 9820 .9 -M * 1.1 -M *
LEWIS LAKE DIVIDE 7850 .0 .0 100 .2 .3 67
PHILLIPS BENCH 8200 .5 .0 .6 .3 200
SALT RIVER SUMMIT 7760 .4 .0 .6 .2 300
SNAKE RIVER STATION 6920 .0 .0 100 .4 .3 133
SPRING CREEK DIVIDE 9000 1.2 .0 1.1 .3 367
THUMB DIVIDE 7980 .4 .0 .8 .2 400
TOGWOTEE PASS 9580 1.5 .2 750 1.0 .3 333
TWO OCEAN PLATEAU 9240 1.0 .3 333 .3 .4 75
WILLOW CREEK 8380 1.9 .0 1.6 .5 320
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Basin wide percent of average 550* 236
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 .7 .7 100 .1 .2 50
BLACK BEAR 8170 .6 .4 150 .5 .3 167
CANYON 7870 .3 .1 300 .3 .2 150
FISHER CREEK 9100 .4 .5 80 .2 .4 50
MADISON PLATEAU 7750 .5 .3 167 .5 .3 167
NORTHEAST ENTRANCE 7350 .0 .0 100 .1 .2 50
PARKER PEAK 9400 -M .8 * .2 .3 67
SYLVAN LAKE 8420 .1 .6 17 .2 .3 67
THUMB DIVIDE 7980 .4 .0 .8 .2 400
TWO OCEAN PLATEAU 9240 1.0 .3 333 .3 .4 75
WHISKEY CREEK 6800 .2 .1 200 .4 .2 200
WHITE MILL 8700 .3 .3 100 .0 .3 0
WOLVERINE 7650 .3 .0 .1 .3 33
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Basin wide percent of average 124 103
WIND RIVER
BURROUGHS CREEK 8750 1.0 .2 500 .9 .2 450
COLD SPRINGS 9630 1.4 .3 467 1.6 .2 800
DEER PARK 9700 1.5 .6 250 1.7 .3 567
HOBBS PARK 10100 2.3 .6 383 2.0 .2 1000
LITTLE WARM 9370 .9 .2 450 .9 .2 450
SOUTH PASS 9040 1.4 .4 350 1.6 .2 800
ST. LAWRENCE ALT 8620 1.4 .3 467 1.8 .2 900
TOGWOTEE PASS 9580 1.5 .2 750 1.0 .3 333
TOWNSEND CREEK 8700 1.9 .3 633 2.0 .3 667
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Basin wide percent of average 429 643
BIGHORN BASIN
BALD MTN. 9380 1.3 .9 144 .8 .3 267
BEAR TRAP MEADOW 8200 .9 .2 450 .9 .2 450
BLACKWATER 9780 1.0 .9 111 .6 .3 200
BONE SPRINGS DIV 9350 .7 .7 100 .6 .4 150
EVENING STAR 9200 .9 .7 129 .7 .3 233
GRAVE SPRINGS 8550 1.8 .3 600 1.8 .3 600
KIRWIN 9550 1.4 .5 280 .8 .2 400
MARQUETTE 8760 2.1 .6 350 1.1 .3 367
MIDDLE POWDER 7760 2.5 .4 625 1.2 .3 400
OWL CREEK 8975 1.5 .3 500 1.0 .2 500
POWDER RIVER PASS 9480 .7 .4 175 .6 .3 200
SHELL CREEK 9580 1.0 .9 111 .7 .3 233
SYLVAN LAKE 8420 .1 .6 17 .2 .3 67
SYLVAN ROAD 7120 .0 .0 100 .2 .2 100
TIMBER CREEK 7950 1.0 .2 500 .9 .2 450
YOUNTS PEAK 8350 .5 .2 250 .5 .3 167
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Basin wide percent of average 223 286
SHOSHONE RIVER
BLACKWATER 9780 1.0 .9 111 .6 .3 200
EVENING STAR 9200 .9 .7 129 .7 .3 233
KIRWIN 9550 1.4 .5 280 .8 .2 400
MARQUETTE 8760 2.1 .6 350 1.1 .3 367
SYLVAN LAKE 8420 .1 .6 17 .2 .3 67
SYLVAN ROAD 7120 .0 .0 100 .2 .2 100
YOUNTS PEAK 8350 .5 .2 250 .5 .3 167
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Basin wide percent of average 171 216
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .9 .2 450 .9 .2 450
BIG GOOSE 7990 .6 .1 600 .7 .3 233
BONE SPRINGS DIV 9350 .7 .7 100 .6 .4 150
BURGESS JUNCTION 7880 1.1 .4 275 .8 .3 267
CLOUD PEAK RESERVOIR 9860 1.1 .2 550 .9 .4 225
DOME LAKE 8880 .6 .4 150 .7 .3 233
GRAVE SPRINGS 8550 1.8 .3 600 1.8 .3 600
HANSEN SAWMILL 8360 .9 .1 900 .8 .2 400
MIDDLE POWDER 7760 2.5 .4 625 1.2 .3 400
POWDER RIVER PASS 9480 .7 .4 175 .6 .3 200
SUCKER CREEK 8880 1.3 .4 325 .9 .3 300
TIE CREEK 6870 1.2 .1 1200 1.3 .4 325
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Basin wide percent of average 362 303
BELLE FOURCHE
BLIND PARK 6890 .8 .2 400 1.4 .3 467
COLE CANYON 5910 1.6 .0 2.3 .3 767
NORTH RAPID CREEK 6130 .6 .0 1.2 .3 400
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Basin wide percent of average 400* 544
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 .0 100 .8 .3 267
DIVIDE PEAK 8880 .5 .3 167 1.6 .3 533
ELK RIVER 8700 .0 .0 100 .8 .3 267
JOE WRIGHT 10120 .5 .2 250 .7 .4 175
NORTH FRENCH CREEK 10130 1.6 .4 400 1.6 .3 533
OLD BATTLE 10000 2.1 .4 525 1.7 .4 425
SAGE CREEK BASIN 7850 .0 .0 100 1.1 .2 550
SOUTH BRUSH CREEK 8440 .0 .0 100 1.3 .3 433
TOWER 10500 2.3 .3 767 1.8 .4 450
WEBBER SPRINGS 9250 .4 .2 200 1.2 .3 400
WILLOW CREEK PASS 9540 .0 .0 100 .3 .2 150
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Basin wide percent of average 411 379
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 .8 .4 200 1.1 .3 367
CASPER MTN. 7900 .4 .1 400 .9 .3 300
DEADMAN HILL 10220 .0 .4 0 .4 .3 133
DEER PARK 9700 1.5 .6 250 1.7 .3 567
LAPRELE CREEK 8375 .1 .1 100 .5 .2 250
RENO HILL 8400 .4 .2 200 .5 .3 167
ROACH 9700 .3 .1 300 .8 .3 267
SAND LAKE 10050 1.7 .6 283 1.3 .3 433
SOUTH PASS 9040 1.4 .4 350 1.6 .2 800
WINDY PEAK 7900 .2 .0 .4 .2 200
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Basin wide percent of average 228 341
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 .0 100 .9 .2 450
DIVIDE PEAK 8880 .5 .3 167 1.6 .3 533
OLD BATTLE 10000 2.1 .4 525 1.7 .4 425
SANDSTONE RS 8150 -M .0 * .7 .2 350
WHISKEY PARK 8950 .8 .1 800 1.3 .3 433
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Basin wide percent of average 425 443
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .8 .1 800 .7 .2 350
BLIND BULL SUM 8650 .9 .0 .8 .2 400
EAST RIM DIVIDE 7930 .9 .0 1.0 .2 500
ELKHART PARK G.S. 9400 1.2 .0 1.0 .3 333
GROS VENTRE SUMMIT 8750 .8 .1 800 .8 .3 267
GUNSIGHT PASS 9820 .9 -M * 1.1 -M *
KENDALL R.S. 7740 .8 .0 .9 .2 450
LOOMIS PARK 8240 1.0 .0 1.0 .2 500
NEW FORK LAKE 8340 .6 .0 .8 .2 400
SNIDER BASIN 8060 .8 .0 .7 .2 350
SPRING CREEK DIVIDE 9000 1.2 .0 1.1 .3 367
TRIPLE PEAK 8500 1.4 .0 1.4 .3 467
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Basin wide percent of average 800* 392
LOWER GREEN RIVER
HAMS FORK 7840 .4 .0 .6 .2 300
HEWINTA 9519 -M .1 * .6 .3 200
HICKERSON PARK 9145 -M .0 * .5 .2 250
HOLE-IN-ROCK 9150 .0 .0 100 .6 .2 300
INDIAN CREEK 9425 1.3 .1 1300 1.2 .3 400
KELLEY R.S. 8180 .7 .0 .6 .2 300
STEEL CREEK PARK 10200 .7 .4 175 .7 .3 233
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Basin wide percent of average 400* 282
UPPER BEAR RIVER
BUG LAKE 7950 .6 .2 300 .6 .3 200
HAYDEN FORK 9212 .4 .2 200 .9 .3 300
KELLEY R.S. 8180 .7 .0 .6 .2 300
LILY LAKE 9156 .2 .2 100 .7 .3 233
MONTE CRISTO 8960 .9 .3 300 .8 .3 267
SALT RIVER SUMMIT 7760 .4 .0 .6 .2 300
TRIAL LAKE 9992 1.0 .4 250 1.0 .3 333
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Basin wide percent of average 238 274
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Average Snow Water Equivalent and
Total Precipitation values
If the Basin wide percent of average value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Average represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the average value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the average value for those sites on this day.
Contact your state water supply staff for assistance.
Reference period for average conditions is 1961-90.
Provisional data, subject to revision.
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-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Normal Snow Water Equivalent and
Total Precipitation values
If the Basin Index (%) value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Median represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Average value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1981-2010.
Provisional data, subject to revision.
* Site -- Either: (a) the current value is missing; (b) the median or
average for the day is not available or is zero; or (c) for snow water
equivalent, the median for the day is less than 10% of the maximum
median value for the year.
* Basin - More than half of the sites within the basin are flagged with *,
preventing the calculation of a meaningful basin index.
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians (for snow water equivalent)
or averages (for precipitation) and the resulting fraction multiplied by 100.